I voted in the 31-40 lb range. I think he was in the very early 30's, but at
4yrs he's still in the 30's, about 38-39lbs. He gained most of his weight in the first 2yrs (he was preemie 5lb 2oz) but in the last 1.5 years he's only gained 8-9lbs and spent most of his growing energy gaining height

My older son was about 25 lbs at 2 yrs, and I expect # 2 will be about the same. My oldest was always in the 25 to 50 % until the last 2 years (he's 7 now) when he hit the 95% for both weight and height. And he's not chubby at all, just solid as a rock and taller than everyone else. Just goes to show you really can't tell how big they will be until they get older.